Air conditioner



FIG. 1 is a top, front, and right side perspective view of an air conditioner showing our new design;

FIG. 2 is a front elevational view thereof;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a left side elevational view thereof;

FIG. 5 is a right side elevational view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an additional front elevational view thereof with the broken-line disclosure of the vents in an open position being for illustrative purposes only and forming no part of the claimed design. The other broken-line disclosure in the views shows portions of the article which also form no part of the claimed design. 

CLAIM The ornamental design for an air conditioner, as shown and described. 